The links below focus primarily on sites with images of Geometridae in adult or larval stages. Other sites with valuable information and some literature reprints will also be added here.

MOTH IMAGES ON THE WEB-GEOMETRIDAE
John Snyder's meta-list of images, arranged by species and Hodges number. From Furman University in South Carolina.

LYNN SCOTT'S LEPIDOPTERA IMAGES
Photos of live moths from a site near Ottawa in Ontario. Many Geometridae as well as other moth families

CATERPILLARS OF EASTERN FORESTS
Valuable images and descriptions of larval stages- many moths including Geometridae.

GEOMETRIDAE OF SOUTHEASTERN ARIZONA
Bruce Walsh's site from University of Arizona -information related to species endemic to the Southwest.

CINDY MEAD'S GEOMETRID IMAGES
Includes Nemoria lixaria, N. rubrifrontaria, many others across all subfamilies

MOSTLY MOTHS OF MARYLAND
Larry Line's image collection from Clarksville, MD. Many species overlap with our Pennsylvania fauna.